Olaplex No.4P Blonde Enhancer Toning Shampoo, 250ml at John Lewis & Partners

Highly concentrated purple shampoo cleanses, tones, and repairs while keeping hair hydrated from roots to ends.

Sulfate-free formula creates a rich lather to neutralise brassiness and boost brightness after one use for all blonde, lightened and grey hair. Natural or stylist-created, root-to-tip or balayage, every client can benefit from using this as part of their Blonde Maintenance Routine for the best blonde yet.

Scientifically Proven: 3x Brighter*.

*Compared to top purple shampoos.